Alexandr Dolgopolov, of Ukraine, returns to Tomas Berdych, of Czech Republic, at the Sony Open Tennis tournament in Key Biscayne, Fla., Thursday, March 27, 2014. (AP Photo/Alan Diaz)

Key Biscayne Tennis

Alexandr Dolgopolov, of Ukraine, returns to Tomas Berdych, of Czech Republic, at the Sony Open Tennis tournament in Key Biscayne, Fla., Thursday, March 27, 2014. (AP Photo/Alan Diaz)

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